On Mon, Jun 27, 2016 at 11:46:39AM +0200, Vlastimil Babka wrote:
> On 05/26/2016 08:22 AM, js1304@xxxxxxxxx wrote:
> >From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> >
> >Now, all reserved pages for CMA region are belong to the ZONE_CMA
> >and there is no other type of pages. Therefore, we don't need to
> >use MIGRATE_CMA to distinguish and handle differently for CMA pages
> >and ordinary pages. Remove MIGRATE_CMA.
> >
> >Unfortunately, this patch make free CMA counter incorrect because
> >we count it when pages are on the MIGRATE_CMA. It will be fixed
> >by next patch. I can squash next patch here but it makes changes
> >complicated and hard to review so I separate that.
>
> Doesn't sound like a big deal.
Okay.
>
> >Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
>
> [...]
>
> >@@ -7442,14 +7401,14 @@ int alloc_contig_range(unsigned long start, unsigned long end,
> > * allocator removing them from the buddy system. This way
> > * page allocator will never consider using them.
> > *
> >- * This lets us mark the pageblocks back as
> >- * MIGRATE_CMA/MIGRATE_MOVABLE so that free pages in the
> >- * aligned range but not in the unaligned, original range are
> >- * put back to page allocator so that buddy can use them.
> >+ * This lets us mark the pageblocks back as MIGRATE_MOVABLE
> >+ * so that free pages in the aligned range but not in the
> >+ * unaligned, original range are put back to page allocator
> >+ * so that buddy can use them.
> > */
> >
> > ret = start_isolate_page_range(pfn_max_align_down(start),
> >- pfn_max_align_up(end), migratetype,
> >+ pfn_max_align_up(end), MIGRATE_MOVABLE,
> > false);
> > if (ret)
> > return ret;
> >@@ -7528,7 +7487,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
> >
> > done:
> > undo_isolate_page_range(pfn_max_align_down(start),
> >- pfn_max_align_up(end), migratetype);
> >+ pfn_max_align_up(end), MIGRATE_MOVABLE);
> > return ret;
> > }
>
> Looks like all callers of {start,undo}_isolate_page_range() now use
> MIGRATE_MOVABLE, so it could be removed.
You're right. Will do in next spin.
Thanks.
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